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Finding the Fourth Proportional to 2,786.68, 3,847.62 and 2,091.88

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Solution

The fourth proportional to 2,786.68, 3,847.62 and 2,091.88 is: 2,888.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.68 : 3,847.62 = 2,091.88 : x
  2. Step 2: Convert to fraction form
    2,786.68/3,847.62 = 2,091.88/x
  3. Step 3: Cross multiply
    2,786.68x = 3,847.62 × 2,091.88
  4. Step 4: Simplify right side
    2,786.68x = 8,048,759.33
  5. Step 5: Solve for x
    x = 8,048,759.33/2,786.68
  6. Step 6: Final answer
    x = 2,888.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.